The two shoes are totally different feeling when wearing/running but at the same time, both good. Personally, I prefer the FORM. The leather really molds to your foot and feels very comfortable, and almost better after wearing for some time. The BASE is more lightweight and the sockfit is quite comfy. The strap is very solid, but being non-flexible has a different feel than leather and laces that have a bit of a give (though the vamp of BASE is stretch mesh). Both in different ways have a "wear it and forget it" feel - in that you forget they are on.